Home
Class 12
PHYSICS
A resistor an inductor and a capacitor a...

A resistor an inductor and a capacitor are connected in series to an ac source An ac voltmeter measures the votage across them as `800 V, 30 V` and `90V` respectively The rms value of the supply voltage is .

A

10 V

B

1 V

C

100 V

D

90 V

Text Solution

Verified by Experts

The correct Answer is:
C
`e=sqrt(e_(R)^(2)+(e_(C)-e_(L))^(2))=100V`
Promotional Banner

Topper's Solved these Questions

  • ELASTICITY

    NIKITA PUBLICATION|Exercise MCQ|314 Videos

  • ELECTRONS AND PHOTONS

    NIKITA PUBLICATION|Exercise MCQs|162 Videos

Similar Questions

Explore conceptually related problems

An inductor and a resistor are connected in series with an ac source. In this circuit.

A resistor R and the capacitor C are connected in series across an ac source of rms voltage 5V if the rms voltage across C is 3V then that across R is .

In an AC circuit resistance, inductance and capacitance are connected in series. The values of potential differences across the three are 70 V, 90 V and 65 V respectively. The value of the potential difference of the AC source is

A resistor and a capacitor are connected in series with an a.c. source. If the potential drop across the capacitor is 5 V and that across resistor is 12 V, applied voltage is

A capacitor and a resistor are connected in series with an a.c. source. If the potential difference across C, R are 120 V and 90 V repectively, and if rms value of current is 3 A, calculate impedance and power factor of the circuit.

A 31.4Omega resistor and 0.1H inductor are connected in series to a 200V, 50Hz ac source. Calculate (ii) the voltage (rms) across the inductor and the resistor.

In an LCR series ac circuit the voltage across L,C and R are V_(1), V_(2) and V_(3) respectively The voltage of the source is .

A resistor, an inductance and a capacitance are connected in series toan a.c. supply. When measured with the help of an a.c. voltmeter, the p.d. across the resistor is found to be 40V, across the inductance 30V, and across the capacitance 60V. What is the supply voltage?

A resistor, an inductance and a capacitance are connected in series toan a.c. supply. When measured with the help of an a.c. voltmeter, the p.d. across the resistor is found to be 40V, across the inductance 30V, and across the capacitance 60V. What is the supply voltage?

NIKITA PUBLICATION-ELECTROMAGNETIC INDUCTION-MCQs
  1. An AC source is 120 V-60 Hz. The value of voltage after 1/720 s from...

    Text Solution

    |

  2. A coil having an inductance of 1//pi henry is connected in series with...

    Text Solution

    |

  3. A resistor an inductor and a capacitor are connected in series to an a...

    Text Solution

    |

  4. An inductive circuit a resistance of 10ohm and an inductance of 2.0 h...

    Text Solution

    |

  5. When 100 V DC is applied across a solenoid, a current of 1.0 A flows i...

    Text Solution

    |

  6. In an LCR series circuit the capacitance is changed from C to 4C For t...

    Text Solution

    |

  7. The reactance of an inductor at 50 Hz is 100Omega. If the frequency is...

    Text Solution

    |

  8. An e.m.f. E=4cos(1000t)volt is applied to an LR circuit of inductance ...

    Text Solution

    |

  9. The magnetic flux associated with a coil changes from zero to 5xx10^(-...

    Text Solution

    |

  10. A coil having 50 turns and an area of 800 cm^(2) is held with its plan...

    Text Solution

    |

  11. The horizontal telegraph wire 100 m long, oriented along magnetic east...

    Text Solution

    |

  12. A coil of effective area 4m^(2) is placed with its plane perpendicular...

    Text Solution

    |

  13. A coil having an area of 0.4 m^(2) and 100 turns is kept perpendicular...

    Text Solution

    |

  14. A square wire loop with sides 0.5 m is placed with its plane perpendic...

    Text Solution

    |

  15. A meter gauge train runs northwards with a constant speed of 22 m/s on...

    Text Solution

    |

  16. The axle of a railway engine is of length 150 cm. the engine oves with...

    Text Solution

    |

  17. A vertical metal rod of length 1.5 m is at rest in the earth's magneti...

    Text Solution

    |

  18. A vertical metal rod 1 m long performs linear SHM at right angles to B...

    Text Solution

    |

  19. A vertical metal rod of length 1 m moves at right angles to its length...

    Text Solution

    |

  20. A metal rod of length 0.5 m rotates at a uniform angular speed about o...

    Text Solution

    |